Unfortunately (for me) the 50BTC never appeared in my balance, and the recipient address shown in Block Explorer is not one in my address book. So, I'm attempting to understand better why I get this message but no bitcoin... I'm guessing that "accepted" (when solo mining using poclbm) does not always mean my miner was the first to submit the solution to the block? Any info on the reasons why I got an "accepted" solution but no 50BTC would be a great help. Thanks again

I'm sorry I reassured you when indeed something is not OK because this is an old block. I searched for the "000f4d2" string but there was an old block that had the same beginning. 

It is possible (albeit rare) that you found a block but within seconds somebody else also found a block and he transmitted it to more nodes (or not necesseraly more but the node that found the next block)  and "won" the race of including it in the blockchain.  It's also possible the the network connection to the outside world was down at the time and your bitcoin daemon hasn't transmitted the block you found.

I checked my logs and it appear it's a former case. My bitcoin received your block but also the competing one:
http://blockexplorer.com/block/000000000000a3f568a8da7609081b020d13a19bb77ca59df0141148330d9aa1

The competing one was the block that the next miner included and you lost the race.

Analyze the debug.log of the bicoin daemon you are running but I'm afraid you were very unlucky.

I have HD5770 with 2.1 and 11.2 drivers(only drivers, no CCC) working with poclbm - 156Mhash/s and winxp sp3

I had sdk 2.3 initially, but deinstalled for 2.2, then for 2.1, which gave me best results in terms of speed

Any update about the CrossfireX issue? :-)

Can someone with Windows 7 64bit post that they use this please?

Also, my 2x5970 rig only works with crossfire ON fwiw

i never got poclbm to work with SDK 2.1 on windows, using 2.2 never causes any cpu-usage though.

and for your 5970-issue,
the prob on windows is, that you can not deactivate the internal-crossfire on 5970s and still use both GPUs.

to make poclbm run on both GPUs (with crossfire ON), i always used 2 different miner-versions,
-poclbm_<latest> on core1
-poclbm_20101126 on core2
which worked fine 'til i got bored and plugged my 5970 to an ubuntu-box.

Just tried a clean install, 2.1, 10.11 drivers, and latest poclbm, didn't work. Updated to 2.2 and it did.

My internet broke today so my miners did nothing for several hours. Would it be possible to modify poclbm so that it continues to work on the last received task when no connection is available?

Same here. Though I tried updating Catalyst before Stream SDK and it still didn't work.